Compare Sigma 17-70mm F2.8-4 DC Macro vs SIGMA 18-50mm F2.8 DC DN vs Tamron 17-70mm F/2.8
Construction
Aperture Blades
7 blades, rounded
7 blades, Rounded blades
9 blades
Colors
Black
Black
Form Factor
Standard Zoom Lens
Standard Zoom Lens
Standard Zoom Lens
Image Size
APS-C
APS-C
APS-C
Lens Barrel
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Pentax K-mount, Sigma SA-mount, Sony A-mount
Leica L-mount, Sony E-mount
Sony E-mount
Material
Plastic barrel, metal mount
Motor
Micro-type ultrasonic
Stepper motor
Stepper motor
Optical Formula | Elements
16 elements
13 elements
16 elements
Optical Formula | Groups
14 groups
10 groups
12 groups
Optical Formula | Special Glass
2 FLD ("F" Low Dispersion) glass elements, 1 SLD (Special Low Dispersion) glass element, 3 aspherical glass lenses including double sided aspherical lens groups
1 Super Low Dispersion and 3 aspherical elements groups
1 aspherical + 2 glass-molded aspherical elements groups
Dimensions
Filter Diameter
72 mm / 2.83 in
55 mm / 2.17 in
67 mm / 2.64 in
Size | Diameter
79 mm / 3.11 in
65 mm / 2.56 in
75 mm / 2.95 in
Size | Length
82 mm / 3.23 in
75 mm / 2.95 in
119 mm / 4.69 in
Weight
465 g / 16.43 oz
290 g / 10.25 oz
525 g / 18.55 oz
Function
Angle Of View
80.7° Diagonal | 70.4° Horizontal | 50.4° Vertical (wide) ~ 23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (tele)
77.4° Diagonal | 67.4° Horizontal | 47.9° Vertical (wide) ~ 32.2° Diagonal | 27.0° Horizontal | 18.2° Vertical (tele)
80.7° Diagonal | 70.4° Horizontal | 50.4° Vertical (wide) ~ 23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (tele)
Aperture
f/2.8–4 ~ f/22
f/2.8 ~ f/22
f/2.8 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
1.5
Focal Length
17 mm ~ 70 mm
18 mm ~ 50 mm
17 mm ~ 70 mm
Focal Length (35mm Equivalent)
25.5 mm ~ 105.0 mm
27.0 mm ~ 75.0 mm
25.5 mm ~ 105.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
Yes
No
Yes
Weather Resistance
Yes
Yes
Zoom Type
External zoom
External zoom
External zoom
Performance
Max Magnification
0.36x
0.21x
Min Focus Distance
220 mm / 8.66 in
120 mm / 4.72 in
190 mm / 7.48 in
Production
Accessory
Lens Hood: LH780-03 (supplied)
Lens Hood: LH582-02 (supplied)
Lens hood included
Debut
2012-09-17
2021-10-19
2020-12-03
Made In
Japan
Japan
Model Name
B070
Reviews
Neofiliac score
65%
55%
69%
Pros
- Optically stabilized
- Rather good resolution
- Constant f/2.8 aperture
- Very sharp wide open
- Dust and splash protection
- Optically stabilized
- Weather-sealed
- Fast AF
- Good image quality
Cons
- External zoom without zoom lock
- Merely 0.36x maximum magnification despite named "Macro"
- External zoom without zoom lock
- Not stabilized
- External zoom without zoom lock
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